Officers from Lancashire Police's Ribble Valley Rural Task Force allegedly spotted the man "poaching with an air rifle" on Saturday morning (January 22).
Police said the suspect was subject to a lifetime ban from possessing firearms, including air weapons.
The rifle was seized and the man was interviewed by police.
"We'll post the results once known," a spokesman for Lancashire Police added
If you believe someone is poaching, contact police by calling 101.
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